Nope, not pull-ups — this is the one bodyweight exercise you need to build strength and muscle in your back and biceps without weights

Build strength and muscle in your back and biceps muscles, and improve pulling power using the bodyweight row. Here's how, according to a personal trainer.
Fit&Well

If you’ve spent all day at your desk and scrolling on your phone, you need these anti-slouching strength exercises

Hold the pulldown bar in an overhand grip and sit on the chair, keeping your arms straight and feet flat on the floor. Pull ...